2 * Common code for mac80211 Prism54 drivers
4 * Copyright (c) 2006, Michael Wu <flamingice@sourmilk.net>
5 * Copyright (c) 2007-2009, Christian Lamparter <chunkeey@web.de>
6 * Copyright 2008, Johannes Berg <johannes@sipsolutions.net>
9 * - the islsm (softmac prism54) driver, which is:
10 * Copyright 2004-2006 Jean-Baptiste Note <jbnote@gmail.com>, et al.
12 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies).
14 * This program is free software; you can redistribute it and/or modify
15 * it under the terms of the GNU General Public License version 2 as
16 * published by the Free Software Foundation.
19 #include <linux/init.h>
20 #include <linux/firmware.h>
21 #include <linux/etherdevice.h>
23 #include <net/mac80211.h>
29 static void p54_dump_tx_queue(struct p54_common *priv)
32 struct ieee80211_tx_info *info;
33 struct p54_tx_info *range;
38 u32 largest_hole = 0, free;
40 spin_lock_irqsave(&priv->tx_queue.lock, flags);
41 printk(KERN_DEBUG "%s: / --- tx queue dump (%d entries) ---\n",
42 wiphy_name(priv->hw->wiphy), skb_queue_len(&priv->tx_queue));
44 prev_addr = priv->rx_start;
45 skb_queue_walk(&priv->tx_queue, skb) {
46 info = IEEE80211_SKB_CB(skb);
47 range = (void *) info->rate_driver_data;
48 hdr = (void *) skb->data;
50 free = range->start_addr - prev_addr;
51 printk(KERN_DEBUG "%s: | [%02d] => [skb:%p skb_len:0x%04x "
52 "hdr:{flags:%02x len:%04x req_id:%04x type:%02x} "
53 "mem:{start:%04x end:%04x, free:%d}]\n",
54 wiphy_name(priv->hw->wiphy), i++, skb, skb->len,
55 le16_to_cpu(hdr->flags), le16_to_cpu(hdr->len),
56 le32_to_cpu(hdr->req_id), le16_to_cpu(hdr->type),
57 range->start_addr, range->end_addr, free);
59 prev_addr = range->end_addr;
60 largest_hole = max(largest_hole, free);
62 free = priv->rx_end - prev_addr;
63 largest_hole = max(largest_hole, free);
64 printk(KERN_DEBUG "%s: \\ --- [free: %d], largest free block: %d ---\n",
65 wiphy_name(priv->hw->wiphy), free, largest_hole);
66 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
68 #endif /* P54_MM_DEBUG */
71 * So, the firmware is somewhat stupid and doesn't know what places in its
72 * memory incoming data should go to. By poking around in the firmware, we
73 * can find some unused memory to upload our packets to. However, data that we
74 * want the card to TX needs to stay intact until the card has told us that
75 * it is done with it. This function finds empty places we can upload to and
76 * marks allocated areas as reserved if necessary. p54_find_and_unlink_skb or
77 * p54_free_skb frees allocated areas.
79 static int p54_assign_address(struct p54_common *priv, struct sk_buff *skb)
81 struct sk_buff *entry, *target_skb = NULL;
82 struct ieee80211_tx_info *info;
83 struct p54_tx_info *range;
84 struct p54_hdr *data = (void *) skb->data;
86 u32 last_addr = priv->rx_start;
87 u32 target_addr = priv->rx_start;
88 u16 len = priv->headroom + skb->len + priv->tailroom + 3;
90 info = IEEE80211_SKB_CB(skb);
91 range = (void *) info->rate_driver_data;
92 len = (range->extra_len + len) & ~0x3;
94 spin_lock_irqsave(&priv->tx_queue.lock, flags);
95 if (unlikely(skb_queue_len(&priv->tx_queue) == 32)) {
97 * The tx_queue is now really full.
99 * TODO: check if the device has crashed and reset it.
101 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
105 skb_queue_walk(&priv->tx_queue, entry) {
107 info = IEEE80211_SKB_CB(entry);
108 range = (void *) info->rate_driver_data;
109 hole_size = range->start_addr - last_addr;
111 if (!target_skb && hole_size >= len) {
112 target_skb = entry->prev;
114 target_addr = last_addr;
117 last_addr = range->end_addr;
119 if (unlikely(!target_skb)) {
120 if (priv->rx_end - last_addr >= len) {
121 target_skb = priv->tx_queue.prev;
122 if (!skb_queue_empty(&priv->tx_queue)) {
123 info = IEEE80211_SKB_CB(target_skb);
124 range = (void *)info->rate_driver_data;
125 target_addr = range->end_addr;
128 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
133 info = IEEE80211_SKB_CB(skb);
134 range = (void *) info->rate_driver_data;
135 range->start_addr = target_addr;
136 range->end_addr = target_addr + len;
137 data->req_id = cpu_to_le32(target_addr + priv->headroom);
138 if (IS_DATA_FRAME(skb) &&
139 unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON))
140 priv->beacon_req_id = data->req_id;
142 __skb_queue_after(&priv->tx_queue, target_skb, skb);
143 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
147 static void p54_tx_pending(struct p54_common *priv)
152 skb = skb_dequeue(&priv->tx_pending);
156 ret = p54_assign_address(priv, skb);
158 skb_queue_head(&priv->tx_pending, skb);
160 priv->tx(priv->hw, skb);
163 static void p54_wake_queues(struct p54_common *priv)
168 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
171 p54_tx_pending(priv);
173 spin_lock_irqsave(&priv->tx_stats_lock, flags);
174 for (i = 0; i < priv->hw->queues; i++) {
175 if (priv->tx_stats[i + P54_QUEUE_DATA].len <
176 priv->tx_stats[i + P54_QUEUE_DATA].limit)
177 ieee80211_wake_queue(priv->hw, i);
179 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
182 static int p54_tx_qos_accounting_alloc(struct p54_common *priv,
186 struct p54_tx_queue_stats *queue;
189 if (WARN_ON(p54_queue >= P54_QUEUE_NUM))
192 queue = &priv->tx_stats[p54_queue];
194 spin_lock_irqsave(&priv->tx_stats_lock, flags);
195 if (unlikely(queue->len >= queue->limit && IS_QOS_QUEUE(p54_queue))) {
196 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
203 if (unlikely(queue->len == queue->limit && IS_QOS_QUEUE(p54_queue))) {
204 u16 ac_queue = p54_queue - P54_QUEUE_DATA;
205 ieee80211_stop_queue(priv->hw, ac_queue);
208 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
212 static void p54_tx_qos_accounting_free(struct p54_common *priv,
215 if (IS_DATA_FRAME(skb)) {
218 spin_lock_irqsave(&priv->tx_stats_lock, flags);
219 priv->tx_stats[GET_HW_QUEUE(skb)].len--;
220 spin_unlock_irqrestore(&priv->tx_stats_lock, flags);
222 if (unlikely(GET_HW_QUEUE(skb) == P54_QUEUE_BEACON)) {
223 if (priv->beacon_req_id == GET_REQ_ID(skb)) {
224 /* this is the active beacon set anymore */
225 priv->beacon_req_id = 0;
227 complete(&priv->beacon_comp);
230 p54_wake_queues(priv);
233 void p54_free_skb(struct ieee80211_hw *dev, struct sk_buff *skb)
235 struct p54_common *priv = dev->priv;
239 skb_unlink(skb, &priv->tx_queue);
240 p54_tx_qos_accounting_free(priv, skb);
241 dev_kfree_skb_any(skb);
243 EXPORT_SYMBOL_GPL(p54_free_skb);
245 static struct sk_buff *p54_find_and_unlink_skb(struct p54_common *priv,
248 struct sk_buff *entry;
251 spin_lock_irqsave(&priv->tx_queue.lock, flags);
252 skb_queue_walk(&priv->tx_queue, entry) {
253 struct p54_hdr *hdr = (struct p54_hdr *) entry->data;
255 if (hdr->req_id == req_id) {
256 __skb_unlink(entry, &priv->tx_queue);
257 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
258 p54_tx_qos_accounting_free(priv, entry);
262 spin_unlock_irqrestore(&priv->tx_queue.lock, flags);
266 void p54_tx(struct p54_common *priv, struct sk_buff *skb)
268 skb_queue_tail(&priv->tx_pending, skb);
269 p54_tx_pending(priv);
272 static int p54_rssi_to_dbm(struct p54_common *priv, int rssi)
274 int band = priv->hw->conf.channel->band;
277 return ((rssi * priv->rssical_db[band].mul) / 64 +
278 priv->rssical_db[band].add) / 4;
281 * TODO: find the correct formula
283 return ((rssi * priv->rssical_db[band].mul) / 64 +
284 priv->rssical_db[band].add) / 4;
288 * Even if the firmware is capable of dealing with incoming traffic,
289 * while dozing, we have to prepared in case mac80211 uses PS-POLL
290 * to retrieve outstanding frames from our AP.
291 * (see comment in net/mac80211/mlme.c @ line 1993)
293 static void p54_pspoll_workaround(struct p54_common *priv, struct sk_buff *skb)
295 struct ieee80211_hdr *hdr = (void *) skb->data;
296 struct ieee80211_tim_ie *tim_ie;
301 /* only beacons have a TIM IE */
302 if (!ieee80211_is_beacon(hdr->frame_control))
308 /* only consider beacons from the associated BSSID */
309 if (compare_ether_addr(hdr->addr3, priv->bssid))
312 tim = p54_find_ie(skb, WLAN_EID_TIM);
317 tim_ie = (struct ieee80211_tim_ie *) &tim[2];
319 new_psm = ieee80211_check_tim(tim_ie, tim_len, priv->aid);
320 if (new_psm != priv->powersave_override) {
321 priv->powersave_override = new_psm;
326 static int p54_rx_data(struct p54_common *priv, struct sk_buff *skb)
328 struct p54_rx_data *hdr = (struct p54_rx_data *) skb->data;
329 struct ieee80211_rx_status *rx_status = IEEE80211_SKB_RXCB(skb);
330 u16 freq = le16_to_cpu(hdr->freq);
331 size_t header_len = sizeof(*hdr);
333 u8 rate = hdr->rate & 0xf;
336 * If the device is in a unspecified state we have to
337 * ignore all data frames. Else we could end up with a
340 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
343 if (!(hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_IN_FCS_GOOD)))
346 if (hdr->decrypt_status == P54_DECRYPT_OK)
347 rx_status->flag |= RX_FLAG_DECRYPTED;
348 if ((hdr->decrypt_status == P54_DECRYPT_FAIL_MICHAEL) ||
349 (hdr->decrypt_status == P54_DECRYPT_FAIL_TKIP))
350 rx_status->flag |= RX_FLAG_MMIC_ERROR;
352 rx_status->signal = p54_rssi_to_dbm(priv, hdr->rssi);
353 if (hdr->rate & 0x10)
354 rx_status->flag |= RX_FLAG_SHORTPRE;
355 if (priv->hw->conf.channel->band == IEEE80211_BAND_5GHZ)
356 rx_status->rate_idx = (rate < 4) ? 0 : rate - 4;
358 rx_status->rate_idx = rate;
360 rx_status->freq = freq;
361 rx_status->band = priv->hw->conf.channel->band;
362 rx_status->antenna = hdr->antenna;
364 tsf32 = le32_to_cpu(hdr->tsf32);
365 if (tsf32 < priv->tsf_low32)
367 rx_status->mactime = ((u64)priv->tsf_high32) << 32 | tsf32;
368 priv->tsf_low32 = tsf32;
370 rx_status->flag |= RX_FLAG_TSFT;
372 if (hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
373 header_len += hdr->align[0];
375 skb_pull(skb, header_len);
376 skb_trim(skb, le16_to_cpu(hdr->len));
377 if (unlikely(priv->hw->conf.flags & IEEE80211_CONF_PS))
378 p54_pspoll_workaround(priv, skb);
380 ieee80211_rx_irqsafe(priv->hw, skb);
382 ieee80211_queue_delayed_work(priv->hw, &priv->work,
383 msecs_to_jiffies(P54_STATISTICS_UPDATE));
388 static void p54_rx_frame_sent(struct p54_common *priv, struct sk_buff *skb)
390 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
391 struct p54_frame_sent *payload = (struct p54_frame_sent *) hdr->data;
392 struct ieee80211_tx_info *info;
393 struct p54_hdr *entry_hdr;
394 struct p54_tx_data *entry_data;
395 struct sk_buff *entry;
396 unsigned int pad = 0, frame_len;
399 entry = p54_find_and_unlink_skb(priv, hdr->req_id);
400 if (unlikely(!entry))
403 frame_len = entry->len;
404 info = IEEE80211_SKB_CB(entry);
405 entry_hdr = (struct p54_hdr *) entry->data;
406 entry_data = (struct p54_tx_data *) entry_hdr->data;
407 priv->stats.dot11ACKFailureCount += payload->tries - 1;
410 * Frames in P54_QUEUE_FWSCAN and P54_QUEUE_BEACON are
411 * generated by the driver. Therefore tx_status is bogus
412 * and we don't want to confuse the mac80211 stack.
414 if (unlikely(entry_data->hw_queue < P54_QUEUE_FWSCAN)) {
415 dev_kfree_skb_any(entry);
420 * Clear manually, ieee80211_tx_info_clear_status would
421 * clear the counts too and we need them.
423 memset(&info->status.ampdu_ack_len, 0,
424 sizeof(struct ieee80211_tx_info) -
425 offsetof(struct ieee80211_tx_info, status.ampdu_ack_len));
426 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info,
427 status.ampdu_ack_len) != 23);
429 if (entry_hdr->flags & cpu_to_le16(P54_HDR_FLAG_DATA_ALIGN))
430 pad = entry_data->align[0];
432 /* walk through the rates array and adjust the counts */
433 count = payload->tries;
434 for (idx = 0; idx < 4; idx++) {
435 if (count >= info->status.rates[idx].count) {
436 count -= info->status.rates[idx].count;
437 } else if (count > 0) {
438 info->status.rates[idx].count = count;
441 info->status.rates[idx].idx = -1;
442 info->status.rates[idx].count = 0;
446 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK) &&
448 info->flags |= IEEE80211_TX_STAT_ACK;
449 if (payload->status & P54_TX_PSM_CANCELLED)
450 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
451 info->status.ack_signal = p54_rssi_to_dbm(priv,
452 (int)payload->ack_rssi);
454 /* Undo all changes to the frame. */
455 switch (entry_data->key_type) {
456 case P54_CRYPTO_TKIPMICHAEL: {
457 u8 *iv = (u8 *)(entry_data->align + pad +
458 entry_data->crypt_offset);
460 /* Restore the original TKIP IV. */
463 iv[1] = (iv[0] | 0x20) & 0x7f; /* WEPSeed - 8.3.2.2 */
465 frame_len -= 12; /* remove TKIP_MMIC + TKIP_ICV */
468 case P54_CRYPTO_AESCCMP:
469 frame_len -= 8; /* remove CCMP_MIC */
472 frame_len -= 4; /* remove WEP_ICV */
476 skb_trim(entry, frame_len);
477 skb_pull(entry, sizeof(*hdr) + pad + sizeof(*entry_data));
478 ieee80211_tx_status_irqsafe(priv->hw, entry);
481 static void p54_rx_eeprom_readback(struct p54_common *priv,
484 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
485 struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data;
491 if (priv->fw_var >= 0x509) {
492 memcpy(priv->eeprom, eeprom->v2.data,
493 le16_to_cpu(eeprom->v2.len));
495 memcpy(priv->eeprom, eeprom->v1.data,
496 le16_to_cpu(eeprom->v1.len));
500 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
501 dev_kfree_skb_any(tmp);
502 complete(&priv->eeprom_comp);
505 static void p54_rx_stats(struct p54_common *priv, struct sk_buff *skb)
507 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
508 struct p54_statistics *stats = (struct p54_statistics *) hdr->data;
512 if (unlikely(priv->mode == NL80211_IFTYPE_UNSPECIFIED))
515 tsf32 = le32_to_cpu(stats->tsf32);
516 if (tsf32 < priv->tsf_low32)
518 priv->tsf_low32 = tsf32;
520 priv->stats.dot11RTSFailureCount = le32_to_cpu(stats->rts_fail);
521 priv->stats.dot11RTSSuccessCount = le32_to_cpu(stats->rts_success);
522 priv->stats.dot11FCSErrorCount = le32_to_cpu(stats->rx_bad_fcs);
524 priv->noise = p54_rssi_to_dbm(priv, le32_to_cpu(stats->noise));
526 tmp = p54_find_and_unlink_skb(priv, hdr->req_id);
527 dev_kfree_skb_any(tmp);
530 static void p54_rx_trap(struct p54_common *priv, struct sk_buff *skb)
532 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
533 struct p54_trap *trap = (struct p54_trap *) hdr->data;
534 u16 event = le16_to_cpu(trap->event);
535 u16 freq = le16_to_cpu(trap->frequency);
538 case P54_TRAP_BEACON_TX:
541 printk(KERN_INFO "%s: radar (freq:%d MHz)\n",
542 wiphy_name(priv->hw->wiphy), freq);
544 case P54_TRAP_NO_BEACON:
546 ieee80211_beacon_loss(priv->vif);
554 case P54_TRAP_FAA_RADIO_OFF:
555 wiphy_rfkill_set_hw_state(priv->hw->wiphy, true);
557 case P54_TRAP_FAA_RADIO_ON:
558 wiphy_rfkill_set_hw_state(priv->hw->wiphy, false);
561 printk(KERN_INFO "%s: received event:%x freq:%d\n",
562 wiphy_name(priv->hw->wiphy), event, freq);
567 static int p54_rx_control(struct p54_common *priv, struct sk_buff *skb)
569 struct p54_hdr *hdr = (struct p54_hdr *) skb->data;
571 switch (le16_to_cpu(hdr->type)) {
572 case P54_CONTROL_TYPE_TXDONE:
573 p54_rx_frame_sent(priv, skb);
575 case P54_CONTROL_TYPE_TRAP:
576 p54_rx_trap(priv, skb);
578 case P54_CONTROL_TYPE_BBP:
580 case P54_CONTROL_TYPE_STAT_READBACK:
581 p54_rx_stats(priv, skb);
583 case P54_CONTROL_TYPE_EEPROM_READBACK:
584 p54_rx_eeprom_readback(priv, skb);
587 printk(KERN_DEBUG "%s: not handling 0x%02x type control frame\n",
588 wiphy_name(priv->hw->wiphy), le16_to_cpu(hdr->type));
594 /* returns zero if skb can be reused */
595 int p54_rx(struct ieee80211_hw *dev, struct sk_buff *skb)
597 struct p54_common *priv = dev->priv;
598 u16 type = le16_to_cpu(*((__le16 *)skb->data));
600 if (type & P54_HDR_FLAG_CONTROL)
601 return p54_rx_control(priv, skb);
603 return p54_rx_data(priv, skb);
605 EXPORT_SYMBOL_GPL(p54_rx);
607 static void p54_tx_80211_header(struct p54_common *priv, struct sk_buff *skb,
608 struct ieee80211_tx_info *info, u8 *queue,
609 u32 *extra_len, u16 *flags, u16 *aid,
610 bool *burst_possible)
612 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
614 if (ieee80211_is_data_qos(hdr->frame_control))
615 *burst_possible = true;
617 *burst_possible = false;
619 if (info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ)
620 *flags |= P54_HDR_FLAG_DATA_OUT_SEQNR;
622 if (info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE)
623 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
625 if (info->flags & IEEE80211_TX_CTL_CLEAR_PS_FILT)
626 *flags |= P54_HDR_FLAG_DATA_OUT_NOCANCEL;
628 *queue = skb_get_queue_mapping(skb) + P54_QUEUE_DATA;
630 switch (priv->mode) {
631 case NL80211_IFTYPE_MONITOR:
633 * We have to set P54_HDR_FLAG_DATA_OUT_PROMISC for
634 * every frame in promiscuous/monitor mode.
635 * see STSW45x0C LMAC API - page 12.
638 *flags |= P54_HDR_FLAG_DATA_OUT_PROMISC;
640 case NL80211_IFTYPE_STATION:
643 case NL80211_IFTYPE_AP:
644 case NL80211_IFTYPE_ADHOC:
645 case NL80211_IFTYPE_MESH_POINT:
646 if (info->flags & IEEE80211_TX_CTL_SEND_AFTER_DTIM) {
648 *queue = P54_QUEUE_CAB;
652 if (unlikely(ieee80211_is_mgmt(hdr->frame_control))) {
653 if (ieee80211_is_probe_resp(hdr->frame_control)) {
655 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP |
656 P54_HDR_FLAG_DATA_OUT_NOCANCEL;
658 } else if (ieee80211_is_beacon(hdr->frame_control)) {
661 if (info->flags & IEEE80211_TX_CTL_INJECTED) {
663 * Injecting beacons on top of a AP is
664 * not a good idea... nevertheless,
665 * it should be doable.
671 *flags |= P54_HDR_FLAG_DATA_OUT_TIMESTAMP;
672 *queue = P54_QUEUE_BEACON;
673 *extra_len = IEEE80211_MAX_TIM_LEN;
678 if (info->control.sta)
679 *aid = info->control.sta->aid;
684 static u8 p54_convert_algo(enum ieee80211_key_alg alg)
688 return P54_CRYPTO_WEP;
690 return P54_CRYPTO_TKIPMICHAEL;
692 return P54_CRYPTO_AESCCMP;
698 int p54_tx_80211(struct ieee80211_hw *dev, struct sk_buff *skb)
700 struct p54_common *priv = dev->priv;
701 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
702 struct p54_tx_info *p54info;
704 struct p54_tx_data *txhdr;
705 unsigned int padding, len, extra_len;
707 u16 hdr_flags = 0, aid = 0;
708 u8 rate, queue = 0, crypt_offset = 0;
711 u8 calculated_tries[4];
712 u8 nrates = 0, nremaining = 8;
713 bool burst_allowed = false;
715 p54_tx_80211_header(priv, skb, info, &queue, &extra_len,
716 &hdr_flags, &aid, &burst_allowed);
718 if (p54_tx_qos_accounting_alloc(priv, skb, queue)) {
719 if (!IS_QOS_QUEUE(queue)) {
720 dev_kfree_skb_any(skb);
723 return NETDEV_TX_BUSY;
727 padding = (unsigned long)(skb->data - (sizeof(*hdr) + sizeof(*txhdr))) & 3;
730 if (info->control.hw_key) {
731 crypt_offset = ieee80211_get_hdrlen_from_skb(skb);
732 if (info->control.hw_key->alg == ALG_TKIP) {
733 u8 *iv = (u8 *)(skb->data + crypt_offset);
735 * The firmware excepts that the IV has to have
736 * this special format
744 txhdr = (struct p54_tx_data *) skb_push(skb, sizeof(*txhdr) + padding);
745 hdr = (struct p54_hdr *) skb_push(skb, sizeof(*hdr));
748 hdr_flags |= P54_HDR_FLAG_DATA_ALIGN;
749 hdr->type = cpu_to_le16(aid);
750 hdr->rts_tries = info->control.rates[0].count;
753 * we register the rates in perfect order, and
754 * RTS/CTS won't happen on 5 GHz
756 cts_rate = info->control.rts_cts_rate_idx;
758 memset(&txhdr->rateset, 0, sizeof(txhdr->rateset));
760 /* see how many rates got used */
761 for (i = 0; i < dev->max_rates; i++) {
762 if (info->control.rates[i].idx < 0)
767 /* limit tries to 8/nrates per rate */
768 for (i = 0; i < nrates; i++) {
770 * The magic expression here is equivalent to 8/nrates for
771 * all values that matter, but avoids division and jumps.
772 * Note that nrates can only take the values 1 through 4.
774 calculated_tries[i] = min_t(int, ((15 >> nrates) | 1) + 1,
775 info->control.rates[i].count);
776 nremaining -= calculated_tries[i];
779 /* if there are tries left, distribute from back to front */
780 for (i = nrates - 1; nremaining > 0 && i >= 0; i--) {
781 int tmp = info->control.rates[i].count - calculated_tries[i];
785 /* RC requested more tries at this rate */
787 tmp = min_t(int, tmp, nremaining);
788 calculated_tries[i] += tmp;
793 for (i = 0; i < nrates && ridx < 8; i++) {
794 /* we register the rates in perfect order */
795 rate = info->control.rates[i].idx;
796 if (info->band == IEEE80211_BAND_5GHZ)
799 /* store the count we actually calculated for TX status */
800 info->control.rates[i].count = calculated_tries[i];
802 rc_flags = info->control.rates[i].flags;
803 if (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) {
807 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
808 burst_allowed = false;
810 } else if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
812 burst_allowed = false;
814 for (j = 0; j < calculated_tries[i] && ridx < 8; j++) {
815 txhdr->rateset[ridx] = rate;
821 hdr_flags |= P54_HDR_FLAG_DATA_OUT_BURST;
823 /* TODO: enable bursting */
824 hdr->flags = cpu_to_le16(hdr_flags);
826 txhdr->rts_rate_idx = 0;
827 if (info->control.hw_key) {
828 txhdr->key_type = p54_convert_algo(info->control.hw_key->alg);
829 txhdr->key_len = min((u8)16, info->control.hw_key->keylen);
830 memcpy(txhdr->key, info->control.hw_key->key, txhdr->key_len);
831 if (info->control.hw_key->alg == ALG_TKIP) {
832 /* reserve space for the MIC key */
834 memcpy(skb_put(skb, 8), &(info->control.hw_key->key
835 [NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY]), 8);
837 /* reserve some space for ICV */
838 len += info->control.hw_key->icv_len;
839 memset(skb_put(skb, info->control.hw_key->icv_len), 0,
840 info->control.hw_key->icv_len);
845 txhdr->crypt_offset = crypt_offset;
846 txhdr->hw_queue = queue;
847 txhdr->backlog = priv->tx_stats[queue].len - 1;
848 memset(txhdr->durations, 0, sizeof(txhdr->durations));
849 txhdr->tx_antenna = ((info->antenna_sel_tx == 0) ?
850 2 : info->antenna_sel_tx - 1) & priv->tx_diversity_mask;
851 if (priv->rxhw == 5) {
852 txhdr->longbow.cts_rate = cts_rate;
853 txhdr->longbow.output_power = cpu_to_le16(priv->output_power);
855 txhdr->normal.output_power = priv->output_power;
856 txhdr->normal.cts_rate = cts_rate;
859 txhdr->align[0] = padding;
861 hdr->len = cpu_to_le16(len);
862 /* modifies skb->cb and with it info, so must be last! */
863 p54info = (void *) info->rate_driver_data;
864 p54info->extra_len = extra_len;